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Use decompressors framework on i386-pc. It increases core size

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by 46 bytes but improves compatibility and maintainability.

	* grub-core/Makefile.core.def (lzma_decompress): New image.
	(kernel): Add i386_pc_ldflags.
	* grub-core/kern/i386/pc/startup.S: Move intial part to ..
	* grub-core/boot/i386/pc/startup_raw.S: ... here. Pass pointers
	to real_to_prot, prot_to_real and device info.
	* include/grub/offsets.h: Renamed decompressor offsets.
	* util/grub-mkimage.c (grub_compression_t): New cmpression lzma.
	(image_target_desc): Remove raw_size and rename decompressor fields.
	(compress_kernel): Handle lzma.
	(generate_image): Handle decompressors on i386-pc.
This commit is contained in:
Vladimir 'phcoder' Serbinenko 2011-11-12 19:53:25 +01:00
parent e9d3421c05
commit 60240b8bc1
12 changed files with 601 additions and 486 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

16
ChangeLog
View file

@ -1,3 +1,19 @@
2011-11-12 Vladimir Serbinenko <phcoder@gmail.com>
Use decompressors framework on i386-pc. It increases core size
by 46 bytes but improves compatibility and maintainability.
* grub-core/Makefile.core.def (lzma_decompress): New image.
(kernel): Add i386_pc_ldflags.
* grub-core/kern/i386/pc/startup.S: Move intial part to ..
* grub-core/boot/i386/pc/startup_raw.S: ... here. Pass pointers
to real_to_prot, prot_to_real and device info.
* include/grub/offsets.h: Renamed decompressor offsets.
* util/grub-mkimage.c (grub_compression_t): New cmpression lzma.
(image_target_desc): Remove raw_size and rename decompressor fields.
(compress_kernel): Handle lzma.
(generate_image): Handle decompressors on i386-pc.
2011-11-12 Vladimir Serbinenko <phcoder@gmail.com>
* configure.ac: Add -fno-asynchronous-unwind-tables.

11
grub-core/Makefile.core.def
View file

@ -34,7 +34,7 @@ kernel = {
ia64_efi_stripflags = '--strip-unneeded -K start -R .note -R .comment';
i386_pc_ldflags = '$(TARGET_IMG_LDFLAGS)';
i386_pc_ldflags = '$(TARGET_IMG_BASE_LDOPT),0x8200';
i386_pc_ldflags = '$(TARGET_IMG_BASE_LDOPT),0x9000';
i386_qemu_ldflags = '$(TARGET_IMG_LDFLAGS)';
i386_qemu_ldflags = '$(TARGET_IMG_BASE_LDOPT),0x8200';
@ -356,6 +356,15 @@ image = {
enable = mips;
};
image = {
name = lzma_decompress;
i386_pc = boot/i386/pc/startup_raw.S;
objcopyflags = '-O binary';
ldflags = '-Wl,-Ttext,0x8200';
enable = i386_pc;
};
image = {
name = fwstart;
mips_loongson = boot/mips/loongson/fwstart.S;

8
grub-core/boot/i386/pc/lnxboot.S
View file

@ -199,12 +199,8 @@ real_code_2:
1:
movl %ss:(DATA_ADDR + GRUB_KERNEL_MACHINE_COMPRESSED_SIZE), %ecx
#if GRUB_KERNEL_I386_PC_NO_REED_SOLOMON_PART + 4 < 0x200
addl $(GRUB_KERNEL_MACHINE_RAW_SIZE - 0x200), %ecx
#else
addl $(GRUB_KERNEL_MACHINE_RAW_SIZE - (GRUB_KERNEL_I386_PC_NO_REED_SOLOMON_PART + 4)), %ecx
#endif
movl %ss:(DATA_ADDR + GRUB_DECOMPRESSOR_MACHINE_COMPRESSED_SIZE), %ecx
addl $((0x9000 - 0x8200) - (GRUB_KERNEL_I386_PC_NO_REED_SOLOMON_PART + 4)), %ecx
2:
call LOCAL(move_memory)

0
grub-core/kern/i386/pc/lzma_decode.S → grub-core/boot/i386/pc/lzma_decode.S
View file

369
grub-core/boot/i386/pc/startup_raw.S Normal file
View file

@ -0,0 +1,369 @@
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 1999,2000,2001,2002,2003,2005,2006,2007,2008,2009,2011 Free Software Foundation, Inc.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GRUB is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <grub/symbol.h>
#include <grub/offsets.h>
#include <grub/machine/boot.h>
#include <grub/machine/memory.h>
#include <grub/machine/kernel.h>
#define ABS(x) ((x) - LOCAL (base) + GRUB_BOOT_MACHINE_KERNEL_ADDR + 0x200)
.file "startup_raw.S"
.text
/* Tell GAS to generate 16-bit instructions so that this code works
in real mode. */
.code16
.globl start, _start
start:
_start:
LOCAL (base):
/*
* Guarantee that "main" is loaded at 0x0:0x8200.
*/
#ifdef __APPLE__
ljmp $0, $(ABS(LOCAL (codestart)) - 0x10000)
#else
ljmp $0, $ABS(LOCAL (codestart))
#endif
/*
* This is a special data area.
*/
. = _start + GRUB_DECOMPRESSOR_MACHINE_COMPRESSED_SIZE
LOCAL(compressed_size):
.long 0
. = _start + GRUB_DECOMPRESSOR_MACHINE_UNCOMPRESSED_SIZE
LOCAL(uncompressed_size):
.long 0
. = _start + GRUB_KERNEL_I386_PC_INSTALL_DOS_PART
LOCAL(dos_part):
.long 0xFFFFFFFF
. = _start + GRUB_KERNEL_I386_PC_INSTALL_BSD_PART
LOCAL(bsd_part):
.long 0xFFFFFFFF
. = _start + GRUB_KERNEL_I386_PC_REED_SOLOMON_REDUNDANCY
reed_solomon_redundancy:
.long 0
/*
* This is the area for all of the special variables.
*/
LOCAL(boot_drive):
.byte 0
/* the real mode code continues... */
LOCAL (codestart):
cli /* we're not safe here! */
/* set up %ds, %ss, and %es */
xorw %ax, %ax
movw %ax, %ds
movw %ax, %ss
movw %ax, %es
/* set up the real mode/BIOS stack */
movl $GRUB_MEMORY_MACHINE_REAL_STACK, %ebp
movl %ebp, %esp
sti /* we're safe again */
/* save the boot drive */
ADDR32 movb %dl, LOCAL(boot_drive)
/* reset disk system (%ah = 0) */
int $0x13
/* transition to protected mode */
DATA32 call real_to_prot
/* The ".code32" directive takes GAS out of 16-bit mode. */
.code32
incl %eax
call grub_gate_a20
movl LOCAL(compressed_size), %edx
addl $(LOCAL(decompressor_end) - GRUB_KERNEL_I386_PC_NO_REED_SOLOMON_PART), %edx
movl reed_solomon_redundancy, %ecx
leal _start + GRUB_KERNEL_I386_PC_NO_REED_SOLOMON_PART, %eax
call EXT_C (grub_reed_solomon_recover)
jmp post_reed_solomon
#include <rs_decoder.S>
.text
. = _start + GRUB_KERNEL_I386_PC_NO_REED_SOLOMON_PART
/*
* Support for booting GRUB from a Multiboot boot loader (e.g. GRUB itself).
* This uses the a.out kludge to load raw binary to the area starting at 1MB,
* and relocates itself after loaded.
*/
.p2align 2 /* force 4-byte alignment */
multiboot_header:
/* magic */
.long 0x1BADB002
/* flags */
.long (1 << 16)
/* checksum */
.long -0x1BADB002 - (1 << 16)
/* header addr */
.long multiboot_header - _start + 0x100000 + 0x200
/* load addr */
.long 0x100000
/* load end addr */
.long 0
/* bss end addr */
.long 0
/* entry addr */
.long multiboot_entry - _start + 0x100000 + 0x200
multiboot_entry:
.code32
/* obtain the boot device */
movl 12(%ebx), %edx
movl $GRUB_MEMORY_MACHINE_PROT_STACK, %ebp
movl %ebp, %esp
/* relocate the code */
movl $(LOCAL(decompressor_end) + 0x200), %ecx
addl LOCAL(compressed_size) - _start + 0x100000 + 0x200, %ecx
movl $0x100000, %esi
movl $GRUB_BOOT_MACHINE_KERNEL_ADDR, %edi
cld
rep
movsb
/* jump to the real address */
movl $multiboot_trampoline, %eax
jmp *%eax
multiboot_trampoline:
/* fill the boot information */
movl %edx, %eax
shrl $8, %eax
xorl %ebx, %ebx
cmpb $0xFF, %ah
je 1f
movb %ah, %bl
movl %ebx, LOCAL(dos_part)
1:
cmpb $0xFF, %al
je 2f
movb %al, %bl
movl %ebx, LOCAL(bsd_part)
2:
shrl $24, %edx
movb %dl, LOCAL(boot_drive)
movb $0xFF, %dh
movl $GRUB_MEMORY_MACHINE_PROT_STACK, %esp
/* enter the usual booting */
call prot_to_real
.code16
jmp LOCAL (codestart)
.code32
post_reed_solomon:
#ifdef ENABLE_LZMA
movl $GRUB_MEMORY_MACHINE_DECOMPRESSION_ADDR, %edi
movl $LOCAL(decompressor_end), %esi
pushl %edi
movl LOCAL (uncompressed_size), %ecx
leal (%edi, %ecx), %ebx
call _LzmaDecodeA
/* _LzmaDecodeA clears DF, so no need to run cld */
popl %esi
#endif
movb LOCAL(boot_drive), %dl
movl LOCAL(dos_part), %eax
movl LOCAL(bsd_part), %ebx
movl $prot_to_real, %edi
movl $real_to_prot, %ecx
jmp *%esi
#include "../../../kern/i386/realmode.S"
/*
* grub_gate_a20(int on)
*
* Gate address-line 20 for high memory.
*
* This routine is probably overconservative in what it does, but so what?
*
* It also eats any keystrokes in the keyboard buffer. :-(
*/
grub_gate_a20:
movl %eax, %edx
gate_a20_test_current_state:
/* first of all, test if already in a good state */
call gate_a20_check_state
cmpb %al, %dl
jnz gate_a20_try_bios
ret
gate_a20_try_bios:
/* second, try a BIOS call */
pushl %ebp
call prot_to_real
.code16
movw $0x2400, %ax
testb %dl, %dl
jz 1f
incw %ax
1: int $0x15
DATA32 call real_to_prot
.code32
popl %ebp
call gate_a20_check_state
cmpb %al, %dl
jnz gate_a20_try_system_control_port_a
ret
gate_a20_try_system_control_port_a:
/*
* In macbook, the keyboard test would hang the machine, so we move
* this forward.
*/
/* fourth, try the system control port A */
inb $0x92
andb $(~0x03), %al
testb %dl, %dl
jz 6f
orb $0x02, %al
6: outb $0x92
/* When turning off Gate A20, do not check the state strictly,
because a failure is not fatal usually, and Gate A20 is always
on some modern machines. */
testb %dl, %dl
jz 7f
call gate_a20_check_state
cmpb %al, %dl
jnz gate_a20_try_keyboard_controller
7: ret
gate_a20_flush_keyboard_buffer:
inb $0x64
andb $0x02, %al
jnz gate_a20_flush_keyboard_buffer
2:
inb $0x64
andb $0x01, %al
jz 3f
inb $0x60
jmp 2b
3:
ret
gate_a20_try_keyboard_controller:
/* third, try the keyboard controller */
call gate_a20_flush_keyboard_buffer
movb $0xd1, %al
outb $0x64
4:
inb $0x64
andb $0x02, %al
jnz 4b
movb $0xdd, %al
testb %dl, %dl
jz 5f
orb $0x02, %al
5: outb $0x60
call gate_a20_flush_keyboard_buffer
/* output a dummy command (USB keyboard hack) */
movb $0xff, %al
outb $0x64
call gate_a20_flush_keyboard_buffer
call gate_a20_check_state
cmpb %al, %dl
/* everything failed, so restart from the beginning */
jnz gate_a20_try_bios
ret
gate_a20_check_state:
/* iterate the checking for a while */
movl $100, %ecx
1:
call 3f
cmpb %al, %dl
jz 2f
loop 1b
2:
ret
3:
pushl %ebx
pushl %ecx
xorl %eax, %eax
/* compare the byte at 0x8000 with that at 0x108000 */
movl $GRUB_BOOT_MACHINE_KERNEL_ADDR, %ebx
pushl %ebx
/* save the original byte in CL */
movb (%ebx), %cl
/* store the value at 0x108000 in AL */
addl $0x100000, %ebx
movb (%ebx), %al
/* try to set one less value at 0x8000 */
popl %ebx
movb %al, %ch
decb %ch
movb %ch, (%ebx)
/* serialize */
outb %al, $0x80
outb %al, $0x80
/* obtain the value at 0x108000 in CH */
pushl %ebx
addl $0x100000, %ebx
movb (%ebx), %ch
/* this result is 1 if A20 is on or 0 if it is off */
subb %ch, %al
xorb $1, %al
/* restore the original */
popl %ebx
movb %cl, (%ebx)
popl %ecx
popl %ebx
ret
#ifdef ENABLE_LZMA
#include "lzma_decode.S"
#endif
.p2align 2
LOCAL(decompressor_end):

6
grub-core/boot/mips/startup_raw.S
View file

@ -38,13 +38,13 @@ start:
bal codestart
nop
base:
. = _start + GRUB_KERNEL_MACHINE_COMPRESSED_SIZE
. = _start + GRUB_DECOMPRESSOR_MACHINE_COMPRESSED_SIZE
compressed_size:
.long 0
. = _start + GRUB_KERNEL_MACHINE_UNCOMPRESSED_SIZE
. = _start + GRUB_DECOMPRESSOR_MACHINE_UNCOMPRESSED_SIZE
uncompressed_size:
.long 0
. = _start + GRUB_KERNEL_MACHINE_UNCOMPRESSED_ADDR
. = _start + GRUB_DECOMPRESSOR_MACHINE_UNCOMPRESSED_ADDR
uncompressed_addr:
.long 0
codestart:

4
grub-core/kern/i386/int.S
View file

@ -47,7 +47,7 @@ FUNCTION(grub_bios_interrupt)
movl 24(%edx), %esi
movl 28(%edx), %edx
call prot_to_real
PROT_TO_REAL
.code16
pushf
cli
@ -98,7 +98,7 @@ intno:
movw %ax, LOCAL(bios_register_es)
popf
DATA32 call real_to_prot
REAL_TO_PROT
.code32
popl %eax

3
grub-core/kern/i386/pc/init.c
View file

@ -156,8 +156,7 @@ grub_machine_init (void)
int grub_lower_mem;
#endif
grub_modbase = GRUB_MEMORY_MACHINE_DECOMPRESSION_ADDR
+ ((_edata - _start) - GRUB_KERNEL_MACHINE_RAW_SIZE);
grub_modbase = GRUB_MEMORY_MACHINE_DECOMPRESSION_ADDR + (_edata - _start);
/* Initialize the console as early as possible. */
grub_console_init ();

392
grub-core/kern/i386/pc/startup.S
View file

@ -1,6 +1,6 @@
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 1999,2000,2001,2002,2003,2005,2006,2007,2008,2009 Free Software Foundation, Inc.
* Copyright (C) 1999,2000,2001,2002,2003,2005,2006,2007,2008,2009,2011 Free Software Foundation, Inc.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@ -43,203 +43,30 @@
#include <config.h>
#include <grub/symbol.h>
#include <grub/machine/boot.h>
#include <grub/machine/memory.h>
#include <grub/machine/console.h>
#include <grub/cpu/linux.h>
#include <grub/machine/kernel.h>
#include <grub/term.h>
#include <multiboot.h>
#include <multiboot2.h>
#define ABS(x) ((x) - LOCAL (base) + GRUB_BOOT_MACHINE_KERNEL_ADDR + 0x200)
.file "startup.S"
.text
/* Tell GAS to generate 16-bit instructions so that this code works
in real mode. */
.code16
.globl start, _start
start:
_start:
LOCAL (base):
/*
* Guarantee that "main" is loaded at 0x0:0x8200.
*/
#ifdef __APPLE__
ljmp $0, $(ABS(LOCAL (codestart)) - 0x10000)
#else
ljmp $0, $ABS(LOCAL (codestart))
#endif
/*
* This is a special data area.
*/
. = _start + GRUB_KERNEL_I386_PC_TOTAL_MODULE_SIZE
VARIABLE(grub_total_module_size)
.long 0
. = _start + GRUB_KERNEL_I386_PC_COMPRESSED_SIZE
VARIABLE(grub_compressed_size)
.long 0
. = _start + GRUB_KERNEL_I386_PC_INSTALL_DOS_PART
VARIABLE(grub_install_dos_part)
.long 0xFFFFFFFF
. = _start + GRUB_KERNEL_I386_PC_INSTALL_BSD_PART
VARIABLE(grub_install_bsd_part)
.long 0xFFFFFFFF
. = _start + GRUB_KERNEL_I386_PC_REED_SOLOMON_REDUNDANCY
reed_solomon_redundancy:
.long 0
#ifdef APPLE_CC
bss_start:
.long 0
bss_end:
.long 0
#endif
/*
* This is the area for all of the special variables.
*/
VARIABLE(grub_boot_drive)
.byte 0
/* the real mode code continues... */
LOCAL (codestart):
cli /* we're not safe here! */
/* set up %ds, %ss, and %es */
xorw %ax, %ax
movw %ax, %ds
movw %ax, %ss
movw %ax, %es
/* set up the real mode/BIOS stack */
movl $GRUB_MEMORY_MACHINE_REAL_STACK, %ebp
movl %ebp, %esp
sti /* we're safe again */
/* save the boot drive */
ADDR32 movb %dl, EXT_C(grub_boot_drive)
/* reset disk system (%ah = 0) */
int $0x13
/* transition to protected mode */
DATA32 call real_to_prot
/* The ".code32" directive takes GAS out of 16-bit mode. */
.code32
incl %eax
call grub_gate_a20
movl EXT_C(grub_compressed_size), %edx
addl $(GRUB_KERNEL_MACHINE_RAW_SIZE - GRUB_KERNEL_I386_PC_NO_REED_SOLOMON_PART), %edx
movl reed_solomon_redundancy, %ecx
leal _start + GRUB_KERNEL_I386_PC_NO_REED_SOLOMON_PART, %eax
call EXT_C (grub_reed_solomon_recover)
jmp post_reed_solomon
#include <rs_decoder.S>
.text
. = _start + GRUB_KERNEL_I386_PC_NO_REED_SOLOMON_PART
/*
* Support for booting GRUB from a Multiboot boot loader (e.g. GRUB itself).
* This uses the a.out kludge to load raw binary to the area starting at 1MB,
* and relocates itself after loaded.
*/
.p2align 2 /* force 4-byte alignment */
multiboot_header:
/* magic */
.long 0x1BADB002
/* flags */
.long (1 << 16)
/* checksum */
.long -0x1BADB002 - (1 << 16)
/* header addr */
.long multiboot_header - _start + 0x100000 + 0x200
/* load addr */
.long 0x100000
/* load end addr */
.long 0
/* bss end addr */
.long 0
/* entry addr */
.long multiboot_entry - _start + 0x100000 + 0x200
multiboot_entry:
.code32
/* obtain the boot device */
movl 12(%ebx), %edx
movl $GRUB_MEMORY_MACHINE_PROT_STACK, %ebp
movl %ebp, %esp
/* relocate the code */
movl $(GRUB_KERNEL_MACHINE_RAW_SIZE + 0x200), %ecx
addl EXT_C(grub_compressed_size) - _start + 0x100000 + 0x200, %ecx
movl $0x100000, %esi
movl $GRUB_BOOT_MACHINE_KERNEL_ADDR, %edi
cld
rep
movsb
/* jump to the real address */
movl $multiboot_trampoline, %eax
jmp *%eax
multiboot_trampoline:
/* fill the boot information */
movl %edx, %eax
shrl $8, %eax
xorl %ebx, %ebx
cmpb $0xFF, %ah
je 1f
movb %ah, %bl
movl %ebx, EXT_C(grub_install_dos_part)
1:
cmpb $0xFF, %al
je 2f
movb %al, %bl
movl %ebx, EXT_C(grub_install_bsd_part)
2:
shrl $24, %edx
movb $0xFF, %dh
/* enter the usual booting */
call prot_to_real
jmp LOCAL (codestart)
post_reed_solomon:
#ifdef ENABLE_LZMA
movl $GRUB_MEMORY_MACHINE_DECOMPRESSION_ADDR, %edi
movl $(_start + GRUB_KERNEL_MACHINE_RAW_SIZE), %esi
pushl %edi
pushl %esi
movl $(BSS_START_SYMBOL - _start), %ecx
addl EXT_C(grub_total_module_size), %ecx
subl $GRUB_KERNEL_MACHINE_RAW_SIZE, %ecx
pushl %ecx
leal (%edi, %ecx), %ebx
call _LzmaDecodeA
/* _LzmaDecodeA clears DF, so no need to run cld */
popl %ecx
popl %edi
popl %esi
#endif
movl %ecx, (LOCAL(real_to_prot_addr) - _start) (%esi)
movl %edi, (LOCAL(prot_to_real_addr) - _start) (%esi)
/* copy back the decompressed part (except the modules) */
subl EXT_C(grub_total_module_size), %ecx
movl $(_edata - _start), %ecx
movl $(_start), %edi
rep
movsb
movl $LOCAL (cont), %esi
jmp *%esi
LOCAL(cont):
#if 0
/* copy modules before cleaning out the bss */
movl EXT_C(grub_total_module_size), %ecx
@ -255,24 +82,14 @@ post_reed_solomon:
movsb
#endif
#ifdef APPLE_CC
/* clean out the bss */
bss_start_abs = ABS (bss_start)
bss_end_abs = ABS (bss_end)
movl %eax, %esi
movl bss_start_abs, %edi
/* compute the bss length */
movl bss_end_abs, %ecx
subl %edi, %ecx
#else
/* clean out the bss */
movl $BSS_START_SYMBOL, %edi
/* compute the bss length */
movl $END_SYMBOL, %ecx
subl %edi, %ecx
#endif
/* clean out */
xorl %eax, %eax
@ -280,172 +97,29 @@ post_reed_solomon:
rep
stosb
movl %esi, EXT_C(grub_install_dos_part)
movb %dl, EXT_C(grub_boot_drive)
movl %ebx, EXT_C(grub_install_bsd_part)
/*
* Call the start of main body of C code.
*/
call EXT_C(grub_main)
#include "../realmode.S"
LOCAL(real_to_prot_addr):
.long 0
LOCAL(prot_to_real_addr):
.long 0
/*
* grub_gate_a20(int on)
*
* Gate address-line 20 for high memory.
*
* This routine is probably overconservative in what it does, but so what?
*
* It also eats any keystrokes in the keyboard buffer. :-(
*/
.macro PROT_TO_REAL
movl LOCAL(prot_to_real_addr), %eax
call *%eax
.endm
grub_gate_a20:
movl %eax, %edx
gate_a20_test_current_state:
/* first of all, test if already in a good state */
call gate_a20_check_state
cmpb %al, %dl
jnz gate_a20_try_bios
ret
gate_a20_try_bios:
/* second, try a BIOS call */
pushl %ebp
call prot_to_real
.code16
movw $0x2400, %ax
testb %dl, %dl
jz 1f
incw %ax
1: int $0x15
DATA32 call real_to_prot
.code32
popl %ebp
call gate_a20_check_state
cmpb %al, %dl
jnz gate_a20_try_system_control_port_a
ret
gate_a20_try_system_control_port_a:
/*
* In macbook, the keyboard test would hang the machine, so we move
* this forward.
*/
/* fourth, try the system control port A */
inb $0x92
andb $(~0x03), %al
testb %dl, %dl
jz 6f
orb $0x02, %al
6: outb $0x92
/* When turning off Gate A20, do not check the state strictly,
because a failure is not fatal usually, and Gate A20 is always
on some modern machines. */
testb %dl, %dl
jz 7f
call gate_a20_check_state
cmpb %al, %dl
jnz gate_a20_try_keyboard_controller
7: ret
gate_a20_flush_keyboard_buffer:
inb $0x64
andb $0x02, %al
jnz gate_a20_flush_keyboard_buffer
2:
inb $0x64
andb $0x01, %al
jz 3f
inb $0x60
jmp 2b
3:
ret
gate_a20_try_keyboard_controller:
/* third, try the keyboard controller */
call gate_a20_flush_keyboard_buffer
movb $0xd1, %al
outb $0x64
4:
inb $0x64
andb $0x02, %al
jnz 4b
movb $0xdd, %al
testb %dl, %dl
jz 5f
orb $0x02, %al
5: outb $0x60
call gate_a20_flush_keyboard_buffer
/* output a dummy command (USB keyboard hack) */
movb $0xff, %al
outb $0x64
call gate_a20_flush_keyboard_buffer
call gate_a20_check_state
cmpb %al, %dl
/* everything failed, so restart from the beginning */
jnz gate_a20_try_bios
ret
gate_a20_check_state:
/* iterate the checking for a while */
movl $100, %ecx
1:
call 3f
cmpb %al, %dl
jz 2f
loop 1b
2:
ret
3:
pushl %ebx
pushl %ecx
xorl %eax, %eax
/* compare the byte at 0x8000 with that at 0x108000 */
movl $GRUB_BOOT_MACHINE_KERNEL_ADDR, %ebx
pushl %ebx
/* save the original byte in CL */
movb (%ebx), %cl
/* store the value at 0x108000 in AL */
addl $0x100000, %ebx
movb (%ebx), %al
/* try to set one less value at 0x8000 */
popl %ebx
movb %al, %ch
decb %ch
movb %ch, (%ebx)
/* serialize */
outb %al, $0x80
outb %al, $0x80
/* obtain the value at 0x108000 in CH */
pushl %ebx
addl $0x100000, %ebx
movb (%ebx), %ch
/* this result is 1 if A20 is on or 0 if it is off */
subb %ch, %al
xorb $1, %al
/* restore the original */
popl %ebx
movb %cl, (%ebx)
popl %ecx
popl %ebx
ret
#ifdef ENABLE_LZMA
#include "lzma_decode.S"
#endif
/*
* The code beyond this point is compressed. Assert that the uncompressed
* code fits GRUB_KERNEL_MACHINE_RAW_SIZE.
*/
. = _start + GRUB_KERNEL_MACHINE_RAW_SIZE
.macro REAL_TO_PROT
movl LOCAL(real_to_prot_addr), %eax
DATA32 call *%ax
.endm
/*
* grub_exit()
@ -453,7 +127,7 @@ gate_a20_check_state:
* Exit the system.
*/
FUNCTION(grub_exit)
call prot_to_real
PROT_TO_REAL
.code16
/* Tell the BIOS a boot failure. If this does not work, reboot. */
int $0x18
@ -482,7 +156,7 @@ FUNCTION(grub_pxe_call)
shll $16, %edx
addl %eax, %edx
call prot_to_real
PROT_TO_REAL
.code16
pushl %ebx
@ -494,7 +168,7 @@ FUNCTION(grub_pxe_call)
addw $10, %sp
movw %ax, %cx
DATA32 call real_to_prot
REAL_TO_PROT
.code32
movzwl %cx, %eax
@ -506,3 +180,11 @@ FUNCTION(grub_pxe_call)
ret
#include "../int.S"
.bss
VARIABLE(grub_boot_drive)
.byte 0
VARIABLE(grub_install_dos_part)
.long 0xFFFFFFFF
VARIABLE(grub_install_bsd_part)
.long 0xFFFFFFFF

27
grub-core/kern/i386/realmode.S
View file

@ -51,6 +51,14 @@
protstack:
.long GRUB_MEMORY_MACHINE_PROT_STACK
.macro PROT_TO_REAL
call prot_to_real
.endm
.macro REAL_TO_PROT
DATA32 call real_to_prot
.endm
/*
* This is the Global Descriptor Table
*
@ -162,6 +170,25 @@ protcseg:
/* return on the old (or initialized) stack! */
ret
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 1999,2000,2001,2002,2003,2005,2006,2007,2009,2010 Free Software Foundation, Inc.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GRUB is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <grub/i386/pc/memory.h>
prot_to_real:
/* just in case, set GDT */

16
include/grub/offsets.h
View file

@ -19,11 +19,11 @@
#ifndef OFFSETS_HEADER
#define OFFSETS_HEADER 1
/* The offset of GRUB_TOTAL_MODULE_SIZE. */
#define GRUB_KERNEL_I386_PC_TOTAL_MODULE_SIZE 0x8
/* The offset of GRUB_COMPRESSED_SIZE. */
#define GRUB_DECOMPRESSOR_I386_PC_COMPRESSED_SIZE 0x08
/* The offset of GRUB_COMPRESSED_SIZE. */
#define GRUB_KERNEL_I386_PC_COMPRESSED_SIZE 0x0c
#define GRUB_DECOMPRESSOR_I386_PC_UNCOMPRESSED_SIZE 0x0c
/* The offset of GRUB_INSTALL_DOS_PART. */
#define GRUB_KERNEL_I386_PC_INSTALL_DOS_PART 0x10
@ -34,15 +34,12 @@
/* Offset of reed_solomon_redundancy. */
#define GRUB_KERNEL_I386_PC_REED_SOLOMON_REDUNDANCY 0x18
/* The size of the first region which won't be compressed. */
#define GRUB_KERNEL_I386_PC_RAW_SIZE 0xc70
#define GRUB_KERNEL_I386_PC_NO_REED_SOLOMON_PART 0x6e0
/* The segment where the kernel is loaded. */
#define GRUB_BOOT_I386_PC_KERNEL_SEG 0x800
#define GRUB_KERNEL_I386_PC_LINK_ADDR 0x8200
#define GRUB_KERNEL_I386_PC_LINK_ADDR 0x9000
/* The upper memory area (starting at 640 kiB). */
#define GRUB_MEMORY_I386_PC_UPPER 0xa0000
@ -62,7 +59,6 @@
#define GRUB_BOOT_SPARC64_IEEE1275_LIST_SIZE 12
#define GRUB_BOOT_SPARC64_IEEE1275_IMAGE_ADDRESS 0x4400
#define GRUB_KERNEL_SPARC64_IEEE1275_RAW_SIZE 0
#define GRUB_KERNEL_SPARC64_IEEE1275_LINK_ADDR 0x4400
#define GRUB_KERNEL_POWERPC_IEEE1275_LINK_ALIGN 4
@ -133,10 +129,12 @@
#define GRUB_BOOT_MACHINE_KERNEL_SEG GRUB_OFFSETS_CONCAT (GRUB_BOOT_, GRUB_MACHINE, _KERNEL_SEG)
#define GRUB_MEMORY_MACHINE_UPPER GRUB_OFFSETS_CONCAT (GRUB_MEMORY_, GRUB_MACHINE, _UPPER)
#define GRUB_KERNEL_MACHINE_RAW_SIZE GRUB_OFFSETS_CONCAT (GRUB_KERNEL_, GRUB_MACHINE, _RAW_SIZE)
#define GRUB_KERNEL_MACHINE_INSTALL_BSD_PART GRUB_OFFSETS_CONCAT (GRUB_KERNEL_, GRUB_MACHINE, _INSTALL_BSD_PART)
#define GRUB_KERNEL_MACHINE_INSTALL_DOS_PART GRUB_OFFSETS_CONCAT (GRUB_KERNEL_, GRUB_MACHINE, _INSTALL_DOS_PART)
#define GRUB_MACHINE_LINK_ADDR GRUB_OFFSETS_CONCAT (GRUB_KERNEL_, GRUB_MACHINE, _LINK_ADDR)
#define GRUB_DECOMPRESSOR_MACHINE_COMPRESSED_SIZE GRUB_OFFSETS_CONCAT (GRUB_DECOMPRESSOR_, GRUB_MACHINE, _COMPRESSED_SIZE)
#define GRUB_DECOMPRESSOR_MACHINE_UNCOMPRESSED_SIZE GRUB_OFFSETS_CONCAT (GRUB_DECOMPRESSOR_, GRUB_MACHINE, _UNCOMPRESSED_SIZE)
#endif
#ifndef ASM_FILE

235
util/grub-mkimage.c
View file

@ -54,7 +54,7 @@
#define TARGET_NO_FIELD 0xffffffff
typedef enum {
COMPRESSION_AUTO, COMPRESSION_NONE, COMPRESSION_XZ
COMPRESSION_AUTO, COMPRESSION_NONE, COMPRESSION_XZ, COMPRESSION_LZMA
} grub_compression_t;
struct image_target_desc
@ -73,13 +73,13 @@ struct image_target_desc
enum
{
PLATFORM_FLAGS_NONE = 0,
PLATFORM_FLAGS_LZMA = 1,
PLATFORM_FLAGS_DECOMPRESSORS = 2,
PLATFORM_FLAGS_MODULES_BEFORE_KERNEL = 4,
} flags;
unsigned raw_size;
unsigned total_module_size;
unsigned compressed_size;
unsigned decompressor_compressed_size;
unsigned decompressor_uncompressed_size;
unsigned decompressor_uncompressed_addr;
unsigned link_align;
grub_uint16_t elf_target;
unsigned section_align;
@ -107,9 +107,10 @@ struct image_target_desc image_targets[] =
.bigendian = 0,
.id = IMAGE_COREBOOT,
.flags = PLATFORM_FLAGS_NONE,
.raw_size = 0,
.total_module_size = TARGET_NO_FIELD,
.compressed_size = TARGET_NO_FIELD,
.decompressor_compressed_size = TARGET_NO_FIELD,
.decompressor_uncompressed_size = TARGET_NO_FIELD,
.decompressor_uncompressed_addr = TARGET_NO_FIELD,
.section_align = 1,
.vaddr_offset = 0,
.install_dos_part = TARGET_NO_FIELD,
@ -127,9 +128,10 @@ struct image_target_desc image_targets[] =
.bigendian = 0,
.id = IMAGE_COREBOOT,
.flags = PLATFORM_FLAGS_NONE,
.raw_size = 0,
.total_module_size = TARGET_NO_FIELD,
.compressed_size = TARGET_NO_FIELD,
.decompressor_compressed_size = TARGET_NO_FIELD,
.decompressor_uncompressed_size = TARGET_NO_FIELD,
.decompressor_uncompressed_addr = TARGET_NO_FIELD,
.section_align = 1,
.vaddr_offset = 0,
.install_dos_part = TARGET_NO_FIELD,
@ -146,10 +148,11 @@ struct image_target_desc image_targets[] =
.voidp_sizeof = 4,
.bigendian = 0,
.id = IMAGE_I386_PC,
.flags = PLATFORM_FLAGS_LZMA,
.raw_size = GRUB_KERNEL_I386_PC_RAW_SIZE,
.total_module_size = GRUB_KERNEL_I386_PC_TOTAL_MODULE_SIZE,
.compressed_size = GRUB_KERNEL_I386_PC_COMPRESSED_SIZE,
.flags = PLATFORM_FLAGS_DECOMPRESSORS,
.total_module_size = TARGET_NO_FIELD,
.decompressor_compressed_size = GRUB_DECOMPRESSOR_I386_PC_COMPRESSED_SIZE,
.decompressor_uncompressed_size = GRUB_DECOMPRESSOR_I386_PC_UNCOMPRESSED_SIZE,
.decompressor_uncompressed_addr = TARGET_NO_FIELD,
.section_align = 1,
.vaddr_offset = 0,
.install_dos_part = GRUB_KERNEL_I386_PC_INSTALL_DOS_PART,
@ -162,10 +165,11 @@ struct image_target_desc image_targets[] =
.voidp_sizeof = 4,
.bigendian = 0,
.id = IMAGE_I386_PC_PXE,
.flags = PLATFORM_FLAGS_LZMA,
.raw_size = GRUB_KERNEL_I386_PC_RAW_SIZE,
.total_module_size = GRUB_KERNEL_I386_PC_TOTAL_MODULE_SIZE,
.compressed_size = GRUB_KERNEL_I386_PC_COMPRESSED_SIZE,
.flags = PLATFORM_FLAGS_DECOMPRESSORS,
.total_module_size = TARGET_NO_FIELD,
.decompressor_compressed_size = GRUB_DECOMPRESSOR_I386_PC_COMPRESSED_SIZE,
.decompressor_uncompressed_size = GRUB_DECOMPRESSOR_I386_PC_UNCOMPRESSED_SIZE,
.decompressor_uncompressed_addr = TARGET_NO_FIELD,
.section_align = 1,
.vaddr_offset = 0,
.install_dos_part = GRUB_KERNEL_I386_PC_INSTALL_DOS_PART,
@ -179,9 +183,10 @@ struct image_target_desc image_targets[] =
.bigendian = 0,
.id = IMAGE_EFI,
.flags = PLATFORM_FLAGS_NONE,
.raw_size = 0,
.total_module_size = TARGET_NO_FIELD,
.compressed_size = TARGET_NO_FIELD,
.decompressor_compressed_size = TARGET_NO_FIELD,
.decompressor_uncompressed_size = TARGET_NO_FIELD,
.decompressor_uncompressed_addr = TARGET_NO_FIELD,
.section_align = GRUB_PE32_SECTION_ALIGNMENT,
.vaddr_offset = ALIGN_UP (GRUB_PE32_MSDOS_STUB_SIZE
+ GRUB_PE32_SIGNATURE_SIZE
@ -201,9 +206,10 @@ struct image_target_desc image_targets[] =
.bigendian = 0,
.id = IMAGE_I386_IEEE1275,
.flags = PLATFORM_FLAGS_NONE,
.raw_size = 0,
.total_module_size = TARGET_NO_FIELD,
.compressed_size = TARGET_NO_FIELD,
.decompressor_compressed_size = TARGET_NO_FIELD,
.decompressor_uncompressed_size = TARGET_NO_FIELD,
.decompressor_uncompressed_addr = TARGET_NO_FIELD,
.section_align = 1,
.vaddr_offset = 0,
.install_dos_part = TARGET_NO_FIELD,
@ -221,9 +227,10 @@ struct image_target_desc image_targets[] =
.bigendian = 0,
.id = IMAGE_QEMU,
.flags = PLATFORM_FLAGS_NONE,
.raw_size = 0,
.total_module_size = TARGET_NO_FIELD,
.compressed_size = TARGET_NO_FIELD,
.decompressor_compressed_size = TARGET_NO_FIELD,
.decompressor_uncompressed_size = TARGET_NO_FIELD,
.decompressor_uncompressed_addr = TARGET_NO_FIELD,
.section_align = 1,
.vaddr_offset = 0,
.install_dos_part = TARGET_NO_FIELD,
@ -237,9 +244,10 @@ struct image_target_desc image_targets[] =
.bigendian = 0,
.id = IMAGE_EFI,
.flags = PLATFORM_FLAGS_NONE,
.raw_size = 0,
.total_module_size = TARGET_NO_FIELD,
.compressed_size = TARGET_NO_FIELD,
.decompressor_compressed_size = TARGET_NO_FIELD,
.decompressor_uncompressed_size = TARGET_NO_FIELD,
.decompressor_uncompressed_addr = TARGET_NO_FIELD,
.section_align = GRUB_PE32_SECTION_ALIGNMENT,
.vaddr_offset = EFI64_HEADER_SIZE,
.install_dos_part = TARGET_NO_FIELD,
@ -254,9 +262,10 @@ struct image_target_desc image_targets[] =
.bigendian = 0,
.id = IMAGE_YEELOONG_FLASH,
.flags = PLATFORM_FLAGS_DECOMPRESSORS,
.raw_size = 0,
.total_module_size = GRUB_KERNEL_MIPS_LOONGSON_TOTAL_MODULE_SIZE,
.compressed_size = TARGET_NO_FIELD,
.decompressor_compressed_size = GRUB_KERNEL_MIPS_LOONGSON_COMPRESSED_SIZE,
.decompressor_uncompressed_size = GRUB_KERNEL_MIPS_LOONGSON_UNCOMPRESSED_SIZE,
.decompressor_uncompressed_addr = GRUB_KERNEL_MIPS_LOONGSON_UNCOMPRESSED_ADDR,
.section_align = 1,
.vaddr_offset = 0,
.install_dos_part = TARGET_NO_FIELD,
@ -273,9 +282,10 @@ struct image_target_desc image_targets[] =
.bigendian = 0,
.id = IMAGE_FULOONG2F_FLASH,
.flags = PLATFORM_FLAGS_DECOMPRESSORS,
.raw_size = 0,
.total_module_size = GRUB_KERNEL_MIPS_LOONGSON_TOTAL_MODULE_SIZE,
.compressed_size = TARGET_NO_FIELD,
.decompressor_compressed_size = GRUB_KERNEL_MIPS_LOONGSON_COMPRESSED_SIZE,
.decompressor_uncompressed_size = GRUB_KERNEL_MIPS_LOONGSON_UNCOMPRESSED_SIZE,
.decompressor_uncompressed_addr = GRUB_KERNEL_MIPS_LOONGSON_UNCOMPRESSED_ADDR,
.section_align = 1,
.vaddr_offset = 0,
.install_dos_part = TARGET_NO_FIELD,
@ -294,9 +304,10 @@ struct image_target_desc image_targets[] =
.bigendian = 0,
.id = IMAGE_LOONGSON_ELF,
.flags = PLATFORM_FLAGS_DECOMPRESSORS,
.raw_size = 0,
.total_module_size = GRUB_KERNEL_MIPS_LOONGSON_TOTAL_MODULE_SIZE,
.compressed_size = TARGET_NO_FIELD,
.decompressor_compressed_size = GRUB_KERNEL_MIPS_LOONGSON_COMPRESSED_SIZE,
.decompressor_uncompressed_size = GRUB_KERNEL_MIPS_LOONGSON_UNCOMPRESSED_SIZE,
.decompressor_uncompressed_addr = GRUB_KERNEL_MIPS_LOONGSON_UNCOMPRESSED_ADDR,
.section_align = 1,
.vaddr_offset = 0,
.install_dos_part = TARGET_NO_FIELD,
@ -313,9 +324,10 @@ struct image_target_desc image_targets[] =
.bigendian = 1,
.id = IMAGE_PPC,
.flags = PLATFORM_FLAGS_NONE,
.raw_size = 0,
.total_module_size = TARGET_NO_FIELD,
.compressed_size = TARGET_NO_FIELD,
.decompressor_compressed_size = TARGET_NO_FIELD,
.decompressor_uncompressed_size = TARGET_NO_FIELD,
.decompressor_uncompressed_addr = TARGET_NO_FIELD,
.section_align = 1,
.vaddr_offset = 0,
.install_dos_part = TARGET_NO_FIELD,
@ -333,9 +345,10 @@ struct image_target_desc image_targets[] =
.bigendian = 1,
.id = IMAGE_SPARC64_RAW,
.flags = PLATFORM_FLAGS_NONE,
.raw_size = GRUB_KERNEL_SPARC64_IEEE1275_RAW_SIZE,
.total_module_size = GRUB_KERNEL_SPARC64_IEEE1275_TOTAL_MODULE_SIZE,
.compressed_size = TARGET_NO_FIELD,
.decompressor_compressed_size = TARGET_NO_FIELD,
.decompressor_uncompressed_size = TARGET_NO_FIELD,
.decompressor_uncompressed_addr = TARGET_NO_FIELD,
.section_align = 1,
.vaddr_offset = 0,
.install_dos_part = TARGET_NO_FIELD,
@ -349,9 +362,10 @@ struct image_target_desc image_targets[] =
.bigendian = 1,
.id = IMAGE_SPARC64_AOUT,
.flags = PLATFORM_FLAGS_NONE,
.raw_size = GRUB_KERNEL_SPARC64_IEEE1275_RAW_SIZE,
.total_module_size = GRUB_KERNEL_SPARC64_IEEE1275_TOTAL_MODULE_SIZE,
.compressed_size = TARGET_NO_FIELD,
.decompressor_compressed_size = TARGET_NO_FIELD,
.decompressor_uncompressed_size = TARGET_NO_FIELD,
.decompressor_uncompressed_addr = TARGET_NO_FIELD,
.section_align = 1,
.vaddr_offset = 0,
.install_dos_part = TARGET_NO_FIELD,
@ -365,9 +379,10 @@ struct image_target_desc image_targets[] =
.bigendian = 0,
.id = IMAGE_EFI,
.flags = PLATFORM_FLAGS_NONE,
.raw_size = 0,
.total_module_size = TARGET_NO_FIELD,
.compressed_size = TARGET_NO_FIELD,
.decompressor_compressed_size = TARGET_NO_FIELD,
.decompressor_uncompressed_size = TARGET_NO_FIELD,
.decompressor_uncompressed_addr = TARGET_NO_FIELD,
.section_align = GRUB_PE32_SECTION_ALIGNMENT,
.vaddr_offset = EFI64_HEADER_SIZE,
.install_dos_part = TARGET_NO_FIELD,
@ -383,9 +398,10 @@ struct image_target_desc image_targets[] =
.id = IMAGE_MIPS_ARC,
.flags = (PLATFORM_FLAGS_DECOMPRESSORS
| PLATFORM_FLAGS_MODULES_BEFORE_KERNEL),
.raw_size = 0,
.total_module_size = GRUB_KERNEL_MIPS_ARC_TOTAL_MODULE_SIZE,
.compressed_size = TARGET_NO_FIELD,
.decompressor_compressed_size = GRUB_KERNEL_MIPS_LOONGSON_COMPRESSED_SIZE,
.decompressor_uncompressed_size = GRUB_KERNEL_MIPS_LOONGSON_UNCOMPRESSED_SIZE,
.decompressor_uncompressed_addr = GRUB_KERNEL_MIPS_LOONGSON_UNCOMPRESSED_ADDR,
.section_align = 1,
.vaddr_offset = 0,
.install_dos_part = TARGET_NO_FIELD,
@ -402,9 +418,10 @@ struct image_target_desc image_targets[] =
.bigendian = 0,
.id = IMAGE_LOONGSON_ELF,
.flags = PLATFORM_FLAGS_DECOMPRESSORS,
.raw_size = 0,
.total_module_size = GRUB_KERNEL_MIPS_QEMU_MIPS_TOTAL_MODULE_SIZE,
.compressed_size = TARGET_NO_FIELD,
.decompressor_compressed_size = GRUB_KERNEL_MIPS_LOONGSON_COMPRESSED_SIZE,
.decompressor_uncompressed_size = GRUB_KERNEL_MIPS_LOONGSON_UNCOMPRESSED_SIZE,
.decompressor_uncompressed_addr = GRUB_KERNEL_MIPS_LOONGSON_UNCOMPRESSED_ADDR,
.section_align = 1,
.vaddr_offset = 0,
.install_dos_part = TARGET_NO_FIELD,
@ -421,9 +438,10 @@ struct image_target_desc image_targets[] =
.bigendian = 1,
.id = IMAGE_QEMU_MIPS_FLASH,
.flags = PLATFORM_FLAGS_DECOMPRESSORS,
.raw_size = 0,
.total_module_size = GRUB_KERNEL_MIPS_QEMU_MIPS_TOTAL_MODULE_SIZE,
.compressed_size = TARGET_NO_FIELD,
.decompressor_compressed_size = GRUB_KERNEL_MIPS_LOONGSON_COMPRESSED_SIZE,
.decompressor_uncompressed_size = GRUB_KERNEL_MIPS_LOONGSON_UNCOMPRESSED_SIZE,
.decompressor_uncompressed_addr = GRUB_KERNEL_MIPS_LOONGSON_UNCOMPRESSED_ADDR,
.section_align = 1,
.vaddr_offset = 0,
.install_dos_part = TARGET_NO_FIELD,
@ -440,9 +458,10 @@ struct image_target_desc image_targets[] =
.bigendian = 0,
.id = IMAGE_QEMU_MIPS_FLASH,
.flags = PLATFORM_FLAGS_DECOMPRESSORS,
.raw_size = 0,
.total_module_size = GRUB_KERNEL_MIPS_QEMU_MIPS_TOTAL_MODULE_SIZE,
.compressed_size = TARGET_NO_FIELD,
.decompressor_compressed_size = GRUB_KERNEL_MIPS_LOONGSON_COMPRESSED_SIZE,
.decompressor_uncompressed_size = GRUB_KERNEL_MIPS_LOONGSON_UNCOMPRESSED_SIZE,
.decompressor_uncompressed_addr = GRUB_KERNEL_MIPS_LOONGSON_UNCOMPRESSED_ADDR,
.section_align = 1,
.vaddr_offset = 0,
.install_dos_part = TARGET_NO_FIELD,
@ -459,9 +478,10 @@ struct image_target_desc image_targets[] =
.bigendian = 1,
.id = IMAGE_LOONGSON_ELF,
.flags = PLATFORM_FLAGS_DECOMPRESSORS,
.raw_size = 0,
.total_module_size = GRUB_KERNEL_MIPS_QEMU_MIPS_TOTAL_MODULE_SIZE,
.compressed_size = TARGET_NO_FIELD,
.decompressor_compressed_size = GRUB_KERNEL_MIPS_LOONGSON_COMPRESSED_SIZE,
.decompressor_uncompressed_size = GRUB_KERNEL_MIPS_LOONGSON_UNCOMPRESSED_SIZE,
.decompressor_uncompressed_addr = GRUB_KERNEL_MIPS_LOONGSON_UNCOMPRESSED_ADDR,
.section_align = 1,
.vaddr_offset = 0,
.install_dos_part = TARGET_NO_FIELD,
@ -593,7 +613,7 @@ static ISzAlloc g_Alloc = { SzAlloc, SzFree };
static void
compress_kernel_lzma (char *kernel_img, size_t kernel_size,
char **core_img, size_t *core_size, size_t raw_size)
char **core_img, size_t *core_size)
{
CLzmaEncProps props;
unsigned char out_props[5];
@ -606,27 +626,21 @@ compress_kernel_lzma (char *kernel_img, size_t kernel_size,
props.pb = 2;
props.numThreads = 1;
if (kernel_size < raw_size)
grub_util_error (_("the core image is too small"));
*core_img = xmalloc (kernel_size);
memcpy (*core_img, kernel_img, raw_size);
*core_size = kernel_size - raw_size;
if (LzmaEncode ((unsigned char *) *core_img + raw_size, core_size,
(unsigned char *) kernel_img + raw_size,
kernel_size - raw_size,
*core_size = kernel_size;
if (LzmaEncode ((unsigned char *) *core_img, core_size,
(unsigned char *) kernel_img,
kernel_size,
&props, out_props, &out_props_size,
0, NULL, &g_Alloc, &g_Alloc) != SZ_OK)
grub_util_error (_("cannot compress the kernel image"));
*core_size += raw_size;
}
#ifdef HAVE_LIBLZMA
static void
compress_kernel_xz (char *kernel_img, size_t kernel_size,
char **core_img, size_t *core_size, size_t raw_size)
char **core_img, size_t *core_size)
{
lzma_stream strm = LZMA_STREAM_INIT;
lzma_ret xzret;
@ -647,20 +661,16 @@ compress_kernel_xz (char *kernel_img, size_t kernel_size,
{ .id = LZMA_VLI_UNKNOWN, .options = NULL}
};
if (kernel_size < raw_size)
grub_util_error (_("the core image is too small"));
xzret = lzma_stream_encoder (&strm, fltrs, LZMA_CHECK_NONE);
if (xzret != LZMA_OK)
grub_util_error (_("cannot compress the kernel image"));
*core_img = xmalloc (kernel_size);
memcpy (*core_img, kernel_img, raw_size);
*core_size = kernel_size - raw_size;
strm.next_in = (unsigned char *) kernel_img + raw_size;
strm.avail_in = kernel_size - raw_size;
strm.next_out = (unsigned char *) *core_img + raw_size;
*core_size = kernel_size;
strm.next_in = (unsigned char *) kernel_img;
strm.avail_in = kernel_size;
strm.next_out = (unsigned char *) *core_img;
strm.avail_out = *core_size;
while (1)
@ -674,8 +684,6 @@ compress_kernel_xz (char *kernel_img, size_t kernel_size,
}
*core_size -= strm.avail_out;
*core_size += raw_size;
}
#endif
@ -684,19 +692,20 @@ compress_kernel (struct image_target_desc *image_target, char *kernel_img,
size_t kernel_size, char **core_img, size_t *core_size,
grub_compression_t comp)
{
if (image_target->flags & PLATFORM_FLAGS_LZMA)
{
compress_kernel_lzma (kernel_img, kernel_size, core_img,
core_size, image_target->raw_size);
return;
}
if (image_target->flags & PLATFORM_FLAGS_DECOMPRESSORS
&& (comp == COMPRESSION_LZMA))
{
compress_kernel_lzma (kernel_img, kernel_size, core_img,
core_size);
return;
}
#ifdef HAVE_LIBLZMA
if (image_target->flags & PLATFORM_FLAGS_DECOMPRESSORS
&& (comp == COMPRESSION_XZ))
{
compress_kernel_xz (kernel_img, kernel_size, core_img,
core_size, image_target->raw_size);
core_size);
return;
}
#endif
@ -747,6 +756,10 @@ generate_image (const char *dir, char *prefix, FILE *out, char *mods[],
if (comp == COMPRESSION_AUTO)
comp = image_target->default_compression;
if (image_target->id == IMAGE_I386_PC
|| image_target->id == IMAGE_I386_PC_PXE)
comp = COMPRESSION_LZMA;
path_list = grub_util_resolve_dependencies (dir, "moddep.lst", mods);
kernel_path = grub_util_get_path (dir, "kernel.img");
@ -903,31 +916,12 @@ generate_image (const char *dir, char *prefix, FILE *out, char *mods[],
&core_img, &core_size, comp);
free (kernel_img);
if (image_target->flags & PLATFORM_FLAGS_DECOMPRESSORS)
kernel_img = core_img + total_module_size;
else
kernel_img = core_img;
grub_util_info ("the core size is 0x%x", core_size);
if (!(image_target->flags & PLATFORM_FLAGS_DECOMPRESSORS)
&& image_target->total_module_size != TARGET_NO_FIELD)
*((grub_uint32_t *) (kernel_img + image_target->total_module_size))
*((grub_uint32_t *) (core_img + image_target->total_module_size))
= grub_host_to_target32 (total_module_size);
if (image_target->compressed_size != TARGET_NO_FIELD)
*((grub_uint32_t *) (kernel_img + image_target->compressed_size))
= grub_host_to_target32 (core_size - image_target->raw_size);
/* If we included a drive in our prefix, let GRUB know it doesn't have to
prepend the drive told by BIOS. */
if (image_target->install_dos_part != TARGET_NO_FIELD
&& image_target->install_bsd_part != TARGET_NO_FIELD && prefix[0] == '(')
{
*((grub_int32_t *) (kernel_img + image_target->install_dos_part))
= grub_host_to_target32 (-2);
*((grub_int32_t *) (kernel_img + image_target->install_bsd_part))
= grub_host_to_target32 (-2);
}
if (image_target->flags & PLATFORM_FLAGS_DECOMPRESSORS)
{
@ -941,6 +935,9 @@ generate_image (const char *dir, char *prefix, FILE *out, char *mods[],
case COMPRESSION_XZ:
name = "xz_decompress.img";
break;
case COMPRESSION_LZMA:
name = "lzma_decompress.img";
break;
case COMPRESSION_NONE:
name = "none_decompress.img";
break;
@ -952,19 +949,30 @@ generate_image (const char *dir, char *prefix, FILE *out, char *mods[],
decompress_size = grub_util_get_image_size (decompress_path);
decompress_img = grub_util_read_image (decompress_path);
*((grub_uint32_t *) (decompress_img + GRUB_KERNEL_MIPS_LOONGSON_COMPRESSED_SIZE))
= grub_host_to_target32 (core_size);
if ((image_target->id == IMAGE_I386_PC
|| image_target->id == IMAGE_I386_PC_PXE)
&& decompress_size > GRUB_KERNEL_I386_PC_LINK_ADDR - 0x8200)
grub_util_error (_("Decompressor is too big"));
*((grub_uint32_t *) (decompress_img + GRUB_KERNEL_MIPS_LOONGSON_UNCOMPRESSED_SIZE))
= grub_host_to_target32 (kernel_size + total_module_size);
if (image_target->decompressor_compressed_size != TARGET_NO_FIELD)
*((grub_uint32_t *) (decompress_img
+ image_target->decompressor_compressed_size))
= grub_host_to_target32 (core_size);
if (image_target->flags & PLATFORM_FLAGS_MODULES_BEFORE_KERNEL)
*((grub_uint32_t *) (decompress_img + GRUB_KERNEL_MIPS_LOONGSON_UNCOMPRESSED_ADDR))
= grub_host_to_target_addr (image_target->link_addr - total_module_size);
else
*((grub_uint32_t *) (decompress_img + GRUB_KERNEL_MIPS_LOONGSON_UNCOMPRESSED_ADDR))
= grub_host_to_target_addr (image_target->link_addr);
if (image_target->decompressor_uncompressed_size != TARGET_NO_FIELD)
*((grub_uint32_t *) (decompress_img
+ image_target->decompressor_uncompressed_size))
= grub_host_to_target32 (kernel_size + total_module_size);
if (image_target->decompressor_uncompressed_addr != TARGET_NO_FIELD)
{
if (image_target->flags & PLATFORM_FLAGS_MODULES_BEFORE_KERNEL)
*((grub_uint32_t *) (decompress_img + image_target->decompressor_uncompressed_addr))
= grub_host_to_target_addr (image_target->link_addr - total_module_size);
else
*((grub_uint32_t *) (decompress_img + image_target->decompressor_uncompressed_addr))
= grub_host_to_target_addr (image_target->link_addr);
}
full_size = core_size + decompress_size;
full_img = xmalloc (full_size);
@ -982,6 +990,17 @@ generate_image (const char *dir, char *prefix, FILE *out, char *mods[],
core_size = full_size;
}
/* If we included a drive in our prefix, let GRUB know it doesn't have to
prepend the drive told by BIOS. */
if (image_target->install_dos_part != TARGET_NO_FIELD
&& image_target->install_bsd_part != TARGET_NO_FIELD && prefix[0] == '(')
{
*((grub_int32_t *) (core_img + image_target->install_dos_part))
= grub_host_to_target32 (-2);
*((grub_int32_t *) (core_img + image_target->install_bsd_part))
= grub_host_to_target32 (-2);
}
switch (image_target->id)
{
case IMAGE_I386_PC:
@ -1249,7 +1268,7 @@ generate_image (const char *dir, char *prefix, FILE *out, char *mods[],
rom_img = xmalloc (rom_size);
memset (rom_img, 0, rom_size);
*((grub_int32_t *) (kernel_img + GRUB_KERNEL_I386_QEMU_CORE_ENTRY_ADDR))
*((grub_int32_t *) (core_img + GRUB_KERNEL_I386_QEMU_CORE_ENTRY_ADDR))
= grub_host_to_target32 ((grub_uint32_t) -rom_size);
memcpy (rom_img, core_img, core_size);